Fuel calculator
Fuel Savings Comparison Calculator
Compare two vehicles or fuel scenarios where both efficiency and fuel price can differ.
Use this calculator
What your result means
Scenario B is lower in the example by £233.64 per year, or £19.47 per month.
Worked example
Example values are illustrative and editable in the calculator.
- Scenario A
- Its own MPG and price
- Scenario B
- Its own MPG and price
Use it to compare vehicles or different fuel assumptions.
Formula
Comparison dimensions
| Scenario | Estimated result |
|---|---|
| Shared annual mileage | Same distance |
| Scenario A | MPG and price |
| Scenario B | MPG and price |
Example A/B fuel-cost comparison
| Scenario | Annual litres | Cost per mile | Annual cost |
|---|---|---|---|
| Scenario A | 1,212.3 litres | 14.3p | £1,721.45 |
| Scenario B | 991.9 litres | 12.4p | £1,487.81 |
When this calculator is useful
Use it to compare two petrol cars, fuel-economy changes, or different pump-price assumptions. It compares fuel-only running cost, not purchase price or whole-life ownership cost.
Assumptions and limitations
- Both scenarios cover the same annual mileage.
- Purchase price and other ownership costs are excluded.
Helpful questions
How is this different from MPG Improvement Savings?
Here both MPG and fuel price can differ between Scenario A and Scenario B.
Can I compare petrol and diesel?
Yes for fuel-only running cost. Use the petrol versus diesel break-even calculator for purchase-price recovery.
Related calculators
- MPG Improvement Savings Calculator
Estimate annual savings from better UK fuel economy.
- Annual Fuel Cost Calculator
Estimate annual fuel spending from mileage, UK MPG and fuel price.
- Petrol vs Diesel Calculator
Compare entered petrol and diesel costs for the same journey.